Indeed bitcoin investment requires lots of patience for you to be able to hold for a long period of time but, I disagree with your point which says you'll have to want for 5 years before you could switch strategies. Well individually we can accumulate as much bitcoin as our financial muscle could carry and that also implies that we could use the strategy that best suits us. The fact that DCA works really great for you doesn't mean someone else can use lump sum, buy the dip or combination of two or more strategies to accumulate bitcoin. What matters most is that you are accumulating at your own pace without stressing other needs. DCA is undoubtedly one of the greatest strategies i have come across but that doesn't mean it will work for everyone thesame way. Some persons due to realization of missed opportunities in the market after they have been educated about bitcoin they might initally start with DCA strategy but when they have done some deeper research and have become more enthusiasts about bitcoin they may decide to put in all their fiat savings at once by using lump sum and continue with DCA from their monthly wage.
Investing in bitcoin needs to be tailored to each person needs. While DCA strategy can work well for some. Each person has their own financial goals and comfort level with risk and investment timeline. It is also important to remember that people can change their investment approach as they learn and become more confident. Your example of someone starting with DCA and then switching to lump sum investment after learning more is great example of this. At the end most important thing is to find investment strategy that works for each person and allows them to buy bitcoin at their own pace without putting their finances in danger.